Circus cyaneus
A low, buoyant hunter of open moor and marsh, ghost-grey or streaky brown.
Size: 44-52 cm | Habitat: Farmland & Countryside Birds | Season: All year
The hen harrier is a slim, long-winged bird of prey that hunts by quartering low over open moorland, rough grassland, and marsh. Males are pale grey with black wingtips, earning the nickname 'grey ghost', while the larger females and young birds are streaky brown with a distinctive white rump.
Male: pale grey, black wingtips, white rump · female/juvenile ('ringtail'): streaky brown, obvious white rump band, banded tail · long wings held in a shallow V while quartering low over ground · buoyant, wavering flight, rarely soars high
Hen harriers hunt with slow, low, tilting flight over open ground, dropping suddenly onto prey such as voles, pipits, and young grouse. In spring, males perform a spectacular tumbling 'sky-dancing' display to attract mates.
The hen harrier is the UK's most intensively persecuted bird of prey — illegal killing on grouse moors is recognised as the single biggest factor holding the English population far below the several hundred pairs the habitat could otherwise support.
The Hen Harrier (Circus cyaneus) is one of Britain's most dramatic birds of prey to watch — a low, tilting, buoyant hunter that seems to pour itself across open moorland rather than fly in a straight line, and in spring, males perform an extraordinary 'sky-dancing' courtship display of steep climbs and tumbling dives.
Despite ample suitable habitat, England's breeding population remains a small fraction of what the uplands could support, and the RSPB and other conservation bodies have documented illegal killing on grouse moors as the principal cause. Satellite-tagged hen harriers have repeatedly 'disappeared' in suspicious circumstances over managed grouse moorland, making this one of the most closely monitored and politically contested species in UK conservation.
For a journal built around the simple joy of spotting birds, the hen harrier is a reminder that not every entry has an easy, feel-good ending — sometimes noticing a bird is also a small act of paying attention to a genuinely difficult conservation story.
🔴 Conservation status: Red (UK Birds of Conservation Concern 5)
Red-listed, with the England breeding population critically depressed by illegal persecution, chiefly on managed grouse moorland, despite legal protection and extensive available habitat.